Optical 3-D Metric Measurements of Local Vocal Fold Deformation Characteristics in an In Vitro Setup

Hüttner, Björn; Sutor, Alexander; Luegmair, Georg; Rupitsch, Stefan J.; Lerch, Reinhard; Döllinger, Michael

doi:10.1109/tbme.2011.2130525

Cited by 3 publications

(3 citation statements)

References 40 publications

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“…In addition to studying vocal fold properties and geometry, experiments are often performed to study the mechanics of vocal fold flow-induced vibration (e.g., [9, 10]). With respect to reliable measurement methods to determine these mechanics, reproducible specimens are needed that withstand several investigations without changes in their material properties.…”

Section: Introductionmentioning

confidence: 99%

Pipette aspiration applied to the characterization of nonhomogeneous, transversely isotropic materials used for vocal fold modeling

Weiß

Thomson

Lerch

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

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The etiology and treatment of voice disorders are still not completely understood. Since the vibratory characteristics of vocal folds are strongly influenced by both anatomy and mechanical material properties, measurement methods to analyze the material behavior of vocal fold tissue are required. Due to the limited life time of real tissue in the laboratory, synthetic models are often used to study vocal fold vibrations. In this paper we focus on two topics related to synthetic and real vocal fold materials. First, because certain tissues within the human vocal folds are transversely isotropic, a fabrication process for introducing this characteristic in commonly-used vocal fold modeling materials is presented. Second, the pipette aspiration technique is applied to the characterization of these materials. By measuring the displacement profiles of stretched specimens that exhibit varying degrees of transverse isotropy, it is shown that local anisotropy can be quantified using a parameter describing the deviation from an axisymmetric profile. The potential for this technique to characterize homogeneous, anisotropic materials, including soft biological tissues such as those found in the human vocal folds, is supplemented by a computational study.

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Section: Introductionmentioning

confidence: 99%

Pipette aspiration applied to the characterization of nonhomogeneous, transversely isotropic materials used for vocal fold modeling

Weiß

Thomson

Lerch

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

Self Cite

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“…It is also necessary to ensure correction of the tangential and radial geometric distortion (curvature) of the lens (Huttner et al 2011).…”

Section: Width Of Shoulder Jointsmentioning

confidence: 99%

The use of stereophotogrammetry to determine the size and spatial coordinates to generate a 3D model of an animal

Ladislav¹,

Hruška²,

Vaculik³

et al. 2017

Res. Agric. Eng.

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Libich L., Hruška M., Vaculík P., Přikryl M. (2017): The use of stereophotogrammetry to determine the size and spatial coordinates to generate a 3D model of an animal. Res. Agr. Eng., This study considers the process of 3D scanning of farm animals using the method of stereophotogrammetry. This involves taking stereoscopic pictures of an animal, from which the spatial coordinates of selected anatomic points on the animal are determined using triangulation. These points are chosen in such a way to make it possible to determine from them the dimensions used in animal breeding databases and to draw a skeleton to be used in generating a 3D model of the animal. The dimensions of the animals were identified from this test group using an analysis of stereoscopic images and these were then compared with measurements done by hand on the same group. It can be said that the process of scanning farm animals in an authentic environment, which can be modified according to the current needs of the required imaging, was verified based on this measurement. This system also allows us to obtain 3D coordinates for further data evaluation and for the possible generation of a 3D model.

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“…Hence, recently Schmidt et al 20 presented a method using a numerical tracking type functional that ensures a deformation as close as possible to experimental measured vocal fold deformations. 21,22 However, there were shortcomings as only static experimental data were used and only a fixed given layer geometry was considered.…”

Section: Introductionmentioning

confidence: 99%

Material and shape optimization for multi-layered vocal fold models using transient loadings

Schmidt

Leugering

Stingl

et al. 2013

The Journal of the Acoustical Society of America

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Commonly applied models to study vocal fold vibrations in combination with air flow distributions are self-sustained physical models of the larynx consisting of artificial silicone vocal folds. Choosing appropriate mechanical parameters and layer geometries for these vocal fold models while considering simplifications due to manufacturing restrictions is difficult but crucial for achieving realistic behavior. In earlier work by Schmidt et al. [J. Acoust. Soc. Am. 129, 2168-2180 (2011)], the authors presented an approach in which material parameters of a static numerical vocal fold model were optimized to achieve an agreement of the displacement field with data retrieved from hemilarynx experiments. This method is now generalized to a fully transient setting. Moreover in addition to the material parameters, the extended approach is capable of finding optimized layer geometries. Depending on chosen material restriction, significant modifications of the reference geometry are predicted. The additional flexibility in the design space leads to a significantly more realistic deformation behavior. At the same time, the predicted biomechanical and geometrical results are still feasible for manufacturing physical vocal fold models consisting of several silicone layers. As a consequence, the proposed combined experimental and numerical method is suited to guide the construction of physical vocal fold models.

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Optical 3-D Metric Measurements of Local Vocal Fold Deformation Characteristics in an In Vitro Setup

Cited by 3 publications

References 40 publications

Pipette aspiration applied to the characterization of nonhomogeneous, transversely isotropic materials used for vocal fold modeling

Pipette aspiration applied to the characterization of nonhomogeneous, transversely isotropic materials used for vocal fold modeling

The use of stereophotogrammetry to determine the size and spatial coordinates to generate a 3D model of an animal

Material and shape optimization for multi-layered vocal fold models using transient loadings

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